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Reporter : Su-Yu Lin 49912005 Wei-Hsiang Yang 49912029 Advisor : Ru-Li Lin Department of Mechanical Engineering Southern Taiwan University of Science and Technology Automatic mechanical watches http://www.google.com.tw/imgres?imgurl=http://farm6.static.flickr.com/5209/520694398 2_e37bf56043_m.jpg&imgrefurl=http://flickrhivemind.net/Tags/%E6%B2%B9%E6%A7%B D/Interesting&h=682&w=1024&tbnid=TijkDDNKQQfZaM&tbnh=183&tbnw=275&zoom= 1&usg=__nFaPKEKGUNeeJ5P6ub97i7X_kJc=

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Directory The origin of the automatic mechanical watch...... 3 Mechanical watch movements principle...... 4 Basic knowledge of mechanical operation...... 6 The mechanical energy storage...... 7 Brief mechanical classification...... 8 Automatic mechanical watches mainly produce energy principle...... 9 The difference between mechanical and quartz watches11 References...... 12

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The origin of automatic mechanical watches History: In 1770, the Swiss watchmakers Perrelet (Abraham-Louis Perrelet) invention automatic mechanical watches for the watch, then the design is more by Breguet (Abraham Louis Breguet (Abraham-Louis Breguet), often called Po Breguet, Brguet) improvements. 1923, Cayman Islands British summer living (John Harwood), automatic mechanical watches invention. In 1930, Rolex summer living based design can improve a 360-degree rotation of the pendulum Tuo, Tuo original design can only swing 300 degrees.

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Mechanical principle of operation Operating table is the use of leverage will spring energy generated by the center wheel is sent to the third round, fourth round, the escapement wheel, cowboys ultimately to balance wheel, followed by reaction of the balance wheel and then playing cowboys back in place of a simple harmonic motion. When the spring to provide power to the center of the wheel, the center of the wheel speed of 60 minutes will be turning a circle, then begin to shift the case to the third round, the migration to the fourth round is based on the speed of 60 seconds a lap conducted rotary.

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Basic knowledge of mechanical operation In fact, watch the rotation is not the direct use of gear, but the gear drives the pinion gear shaft and gear with each other. Mechanical power source is not the battery, but by the hand chain winding or automatic winding. The most important infrastructure "barrel": curling steel bars produced by elastic force caused.

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The mechanical energy storage Energy storage, the mechanical structure simply, is set in a round through the barrel of the Department of Large bays, and complex gear train has a gear called the clutch wheel, its role is winding back the full chain protecting it is not sustainable on the chain which led to the fracture, is an important protection mechanism, the device is usually used for models on the list automatically.

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Brief mechanical classification In mechanical watches can be divided into: Manual mechanical watch: manual mechanical watches usually via turning the crown / leading to tight winding sheet, released by the spring system able to start out the watch timer function. All of these processes by mechanical principles and construction to complete. Automatic mechanical watch: automatic mechanical watch is a modified manual mechanical watches, table joined in a pendulum Tuo; When worn, oscillating weight may be due to the rotation of the wrist activity table, and achieve the "clockwork" effect.

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Automatic mechanical watches mainly produce energy principle The basic principle of automatic mechanical watch is a natural by arm shaking, rocking back and forth so that the oscillating weight inside the watch, and then through the chain gear box automatically turn a wound spring, the spring release of its own natural energy, then through shift gears and escapement governor, causing the second hand moves, and then make the minute hand and the hour hand moves through the gear shift. Tuo: Tuo automatic mechanical watch is a half-moon centrifugal block pieces, usually located on the back of the movement.

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Tuo Videos: https://www.youtube.com/watch?v=NY_t-s4ThBM https://www.youtube.com/watch?v=NY_t-s4ThBM This piece is semi-circular oscillating weight, automatic mechanical watch is relying on its rock to a wound.

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The difference between mechanical and quartz watches Mechanical advantages 1. Mechanical watch without external power 2. No need to change the battery 3. Longer life Mechanical shortcomings 1.Accuracy on the affected environment 2. Wearers so affected One is purely mechanical, with the spring to drive the gear. One is electronic, using battery power to drive the quartz oscillator to drive the gears. Quartz watch advantages 1.Battery as the power source, power source stability 2.Time quite accurately 3.Because electronic circuit boards, watches relatively thin, light Quartz watch shortcomings 1.Must periodically replace the battery 2.Batteries also have pollution problems 3.Electronic circuit may also aging 4.Short-lived

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Reference material http://sh1.obuy.tw/candywatch/item.asp?item_id=586206 http://zh.wikipedia.org/wiki/%E6%89%8B%E9%8C%B6 http://tw.knowledge.yahoo.com/question/question?qid=1205082404162 http://www.chinabaike.com/article/316/327/2007/2007022156629.html http://tw.myblog.yahoo.com/jw!ES5GzQmYBR.DTM34x9Y- /article?mid=1667 http://bime-talks.blogspot.tw/2007/06/blog- post_7808.htmhttp://tw.myblog.yahoo.com/jw!ES5GzQmYBR.DTM34x9Y- /article?mid=1667l http://www.relove.com.tw/pedia16.asp http://tw.images.search.yahoo.com/search/images?p=%E6%A9%9F%E6%A 2%B0%E9%8C%B6&fr=yfp&ei=utf-8&v=0 The main reference "Wikipedia"

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Thanks for watching The End